[coreboot] Patch merged into coreboot/master: 665e3d2 link/graphics: add functions to support aux channel communications

the following patch was just integrated into master:
commit 665e3d23f0ca5bfac0d1ad9b7a8cde383ec56289
Author: Ronald G. Minnich 
Date:   Wed Feb 27 09:54:47 2013 -0800

link/graphics: add functions to support aux channel communications

For full integration of FUI into coreboot, we need aux channel
    communcations.  The intel_dp.c is a file taken from Linux and is
    used for aux channel comms.  This file has been cut down to work
    with coreboot.  For now it is associated with the link mainboard
    until we get a better handle on how this all fits together.  This
    code is almost certainly usable on other platforms in the long term.
    But one step at a time.

Change-Id: I7be4c56e0a7903f3901ac86e12b28f3bdc0f7947
    Signed-off-by: Ronald G. Minnich 
    Reviewed-on: http://review.coreboot.org/2834
    Tested-by: build bot (Jenkins)
    Reviewed-by: Ronald G. Minnich

Build-Tested: build bot (Jenkins) at Tue Mar 19 22:32:59 2013, giving +1
Reviewed-By: Ronald G. Minnich  at Tue Mar 19 22:42:39 2013, giving +2
See http://review.coreboot.org/2834 for details.

-gerrit